| details |
Frasnian |
|
Euramerica |
Streel,M. et al. Paleozoic spores and pollen; Middle and Upper Devonian miospore. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Early Frasnian |
Middle Frasnian |
Canada(Arctic) |
Whiteley,M.J. Frasnian and Givetian miospores from the Key Point Well, Parry Islands, Arctic Canada. (In: A Field Guide to Selected Outcrop Area of the Devonian of Scotland, the Welsh Borderland and South Wales. P.F.Friend and B.P.L.Williams, editors) |
1978 |
| details |
Precambriam |
|
USSR |
Yankauskas,T.V. et al. Status of the study. (In: Precambrian Microfossils of the USSR. T.V.Yankauskas, editor) |
1989 |
| details |
Precambriam |
|
USSR |
Yankauskas,T.V. et al. Fifth All-Union Colloquium on Precambrian microfossils of the USSR |
1987 |